Time:12/24/2018 1:38:13 PMauthor:source:
How to distinguish the north and south poles of the magnet
What is the magnetization (orientation) direction?
Most magnetic materials can be magnetized to saturation in the same direction, a direction called "magnetization direction" (orientation direction). A magnet that has no orientation direction (also called an isotropic magnet) is much weaker than an oriented magnet (also called an anisotropic magnet).
What is the standard “Northern and North Pole” industrial definition?
"Arctic" is defined as the north pole of the earth pointing to the north pole of the earth after the magnet rotates freely. Similarly, the south pole of the magnet also points to the south pole of the earth.
How to identify the north pole of the magnet without marking?
Obviously it is impossible to tell by eye alone. You can use the compass to stick to the magnet, and the pointer to the north pole of the Earth points to the south pole of the magnet.
How to handle and store magnets safely?
Always be very careful, as the magnets will stick together and may pinch your fingers. When the magnets are attracted to each other, the magnet itself may be damaged by the collision (the corners are knocked off or the cracks are knocked out). Keep magnets away from items that are easily magnetized, such as floppy disks, credit cards, computer monitors, watches, mobile phones, medical devices, etc.
Magnets were used in China long ago, and the compass of one of the four great inventions in ancient China was based on the principle of magnets. Through the continuous advancement and development of society, magnets have become a powerful material in our lives. Although the process of manufacturing forcible magnets is very slow, the development and manufacture of each type of powerful magnet has promoted the development of magnetic technology.
After thousands of years of development, today's magnets have become a powerful material in our lives. By synthesizing alloys of different materials, the same effect as that of the magnetite can be achieved, and the magnetic force can be increased. Man-made magnets appeared in the 18th century, but the process of making stronger magnetic materials was very slow until the 1920s when Alnico was made.
Subsequently, ferrite was produced in the 1950s, and rare earth magnets were produced in the 1970s [RareEarthmagnet including NdFeB and SmCo). At this point, magnetic technology has developed rapidly, and magnetic materials have also made components more compact.
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